Scholars Weigh the Politics of Irish Reunification
As global conversations around sovereignty and self-determination intensify, Irish reunification — once seen as a distant or dormant issue — has reemerged as a real political possibility. This shifting landscape set the stage for a timely panel discussion titled “Irish Reunification by 2030?” hosted by Columbia University’s Committee on Global Thought, and co-sponsored by SIPA’s Institute for Global Politics (IGP).
The panel featured Stephanie McCurry, Professor of History at Columbia University, and Adam Tooze, Professor of History at Columbia University. They were joined by Brendan O’Leary, Lauder Professor of Political Science at the University of Pennsylvania, whose advisory work spans the British Labour Party, the United Nations, and the Kurdistan Regional Government; and Niall Ó Dochartaigh, Professor of Political Science at the University of Galway and a current Fulbright Fellow at New York University, whose research focuses on negotiation and conflict in Northern Ireland.
O’Leary, drawing on decades of research and policy advising, pointed to demographic realities reshaping Northern Ireland. “The state was created to secure a two-to-one Protestant majority,” he said. “Today, there is already a cultural Catholic majority — that’s unprecedented.” Recent surveys, he noted, show a rise in support for unification from 27 percent in 2022 to 34 percent in 2024. “If that trend continues, we’re on the brink of parity — within just a few years.” But as both O’Leary and Ó Dochartaigh emphasized, demographics alone won’t determine the outcome. The real question is how — and when — a referendum might be triggered, and what shape it would take.
The panel also explored the mechanics of how reunification could actually happen, beginning with the questions of who gets to trigger a referendum and who gets to vote. Under the terms of the Good Friday Agreement, the UK Secretary of State for Northern Ireland is legally responsible for calling a border poll if it appears a majority in the North would vote for unification. Polls alone won’t suffice. Electoral results, such as a majority of pro-unification Members of the Legislative Assembly (MLAs) in Stormont or Members of Parliament (MPs) at Westminster, could be a more decisive signal. Under current UK practice, the franchise would follow Westminster rules, potentially including Northern Irish citizens abroad who left within the past 20 years. In contrast, the Republic of Ireland does not extend voting rights to its diaspora, meaning only residents currently living in the Republic would be eligible to vote.
Ó Dochartaigh raised concerns about the fragility of the process, warning that “the British government remains the sovereign power. And if things get close — say, 45–45 with 10 percent undecided — they [the British government] will exert influence.” He also offered a sobering reminder of assumptions in the South: “Most people in the Republic believe the North would simply join the Republic as is. Any sense that their sovereignty might be diluted — or that the Republic would be fundamentally changed — could trigger resistance.”
As McCurry underscored in her remarks, the conversation was not just theoretical or historical — it was centered on questions of legitimacy, democratic agency, and timely preparation for a future that may come sooner than expected.